Search results
Results From The WOW.Com Content Network
Osmium tetroxide binds to lipids, consequently staining and fixing them, making the lipids then visible during electron scanning. [5] In the staining of plasma membrane like structures, such as spherosomes, osmium tetroxide binds to the phospholipid regions, thus creating a contrast with the surrounding cytoplasm making it easy to identify the ...
The first step is synthesizing the backbone (sphingosine or glycerol), the second step is the addition of fatty acids to the backbone to make phosphatidic acid. Phosphatidic acid is further modified with the attachment of different hydrophilic head groups to the backbone. Membrane lipid biosynthesis occurs in the endoplasmic reticulum membrane ...
Lipid bilayers are large enough structures to have some of the mechanical properties of liquids or solids. The area compression modulus K a, bending modulus K b, and edge energy , can be used to describe them. Solid lipid bilayers also have a shear modulus, but like any liquid, the shear modulus is zero for fluid bilayers. These mechanical ...
Schematic showing two possible conformations of the lipids at the edge of a pore. In the top image the lipids have not rearranged, so the pore wall is hydrophobic. In the bottom image some of the lipid heads have bent over, so the pore wall is hydrophilic. Edge energy is the energy per unit length of a free edge contacting water.
One lipid-cholesterol system that has recently been studied intently is the lipid raft. Lipid rafts are cholesterol-enriched gel domains that have been potentially implicated in certain cell signaling processes, [ 12 ] but the subject remains controversial, with some researchers doubting even their existence in vivo.
Lipid droplets, also referred to as lipid bodies, oil bodies or adiposomes, [1] are lipid-rich cellular organelles that regulate the storage and hydrolysis of neutral lipids and are found largely in the adipose tissue. [2] They also serve as a reservoir for cholesterol and acyl-glycerols for membrane formation and maintenance.
In the last step, monoacylglycerol is hydrolyzed to make glycerol and this is catalyzed by monoacylglycerol lipase (MGL). Example of a triacylglycerol. Lipolysis / l ɪ ˈ p ɒ l ɪ s ɪ s / is the metabolic pathway through which lipid triglycerides are hydrolyzed into a glycerol and free fatty acids.
In this model, the cell membrane surface is modeled as a two-dimensional fluid-like lipid bilayer where the lipid molecules can move freely. The proteins are partially or fully embedded in the lipid bilayer. Fully embedded proteins are called integral membrane proteins because they traverse the entire thickness of the lipid bilayer. These ...